27th September 2013
BMW has revealed details of its new M4 and M3 models, both of which feature a range of technologies that keep weight to a minimum and maximize performance and fuel efficiency. The M4 coupe will weigh in at just under 1,500 kg (3,307 lbs), around 80 kg (176 lbs) lighter than a comparably equipped predecessor model, helping to reduce fuel consumption by 25%.
Carbon fiber reinforced plastics (CFRP) has been used to lower weight of several key components including the roof, drive shaft, trunk and front strut brace. The driveshaft alone is reported to be 40% lighter than the previous model. Elsewhere, forged aluminum has been used for suspension components and are 17% lighter as a result. The M3 sedan will also get a CFRP roof.
The gearbox has been redesigned to be more compact and about 12 kg (26 lbs) lighter than its predecessor.
Lightweight “compound” brakes are standard, while M carbon ceramic brakes are available for even greater weight savings and thermal capacity.